Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71c1eac69ee5193d672b517081331e5b43a489e55bfde9b2b39395c87430ef95' 
  AND token = 'wTXANZnpCFA6ohfJDIQh4jvlJwh6ymyOQjLAj5S2ZGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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