Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b190c9441a0bcdc599b17235e5ff5d13e5397aebda6f1bf6ada18405c6bd3de' 
  AND token = 'oi4vmV7wPI52GTf6H20GSubkh+2IoQBKetxDu09tZ9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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