Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e071b159b3450e5c43222a510b0e9065a95737b315e10b465063d40c5ca064b8' 
  AND token = 'HpUxv4cSHnLrG2CvFxcS0YoByC9Z7gyeHt2P+5e1t/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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