Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb657f8cf5c081e7042280e51502756eda771f4e16a964ae8264661eb950bda1' 
  AND token = 'kp99e1rvzh6fGaMupX4q413tDA6Wgcnaz3lcWLrfHS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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