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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ee87bb4e6ac748dfa38ba6dd8c08f9bee28327898ec7e08a716b0550d4d2a5c' 
  AND token = 'a4aJAr37jchiL73dEBA9V4st76Reez7X3tlx7fxeCRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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