Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf43a9f82a52288fcbccb55a454e97835d56785245ce5d8313a1d84f3938aa4d' 
  AND token = 'SKZCF+fA6o7Jws+DnB9T2+TI3I31g9i1reEWZO6Y/6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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