Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35b4d06f79e2fcc2da85b38dc3660c6485f9b2d0ca8de2b02d076fa72d470925' 
  AND token = '8Ir9tr5zixUoOcLjm9zGZ72iQM1ekxkffAHqtrsWE6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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