Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '300520951ae2b341f26a3ec582405fa39a7ded4f048088a156d68fc2c55c4738' 
  AND token = 'xBxaNloN9Dhtme2dNit0B3BxExotJR39xAio2JWilPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}