Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4092fcc08044e71392ccec2c7762f86f03340f586bde985ff160b61204822293' 
  AND token = 'hcdgae8QoTCkVIZ4u1UEM+8zPS+O4PTMUmq96sRF8to=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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