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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '863bd72d4f038219aa8dc44a330b526aa39cc8c029d109618d4b9112f70787a8' 
  AND token = 'MK2fNFU0/IvjgwH2tgodSad8unFGMW10Dui6tOrg0j0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}