Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '045240d4d149637111062f3d6117d98e70ed67a8e002914142c9931eaa680e19' 
  AND token = 'PiRrakskSneokFT3OqxnGMJQnUueDbWON7DDwV5fPsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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