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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d0f21166ba73a11f9c4d5d10c185aee8625d17f6445710559c6cc3a62d0e892' 
  AND token = 'OngasOldPP6GYXXtax2A9rJRDZrW5J0g421N22pFxo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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