Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa62c433ca82e518fc088496f44a9a672e2fc98b30105bdaa9f68ad0af05eddd' 
  AND token = 'HRVlu6D0x+sSCwaaQu29QEhBqgxkRJhhGQfHn1rXVm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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