Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e62ffa192ae02ff153ccffd61e0e533af11a2dd30a313635f87589908dbfe57f' 
  AND token = 'zQkpMnkXuvTg7jEiTCJkjPUyBieK6PQV6mSreJ3jnyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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