Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e27c4d36c5e67b06144fc114eee9b4b614c9125e4a58d1064cf0bba5a03b54f' 
  AND token = 'riE1OOHpjs0O4ihAvkgqwO0dtJwInPO6g+mtQR3LOAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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