Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68eed3f5a98ced8ba2cc2159d6f66955a0c6c795e7ab663bd6914dcfc412258e' 
  AND token = 'yQ4Ly0tleVSy68g+C91xqFftiMkJei+QFvL8TNOCen8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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