Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dcd5073e5061d9ec3cf215b289cfd9931b41d88d6e79ab0380fc1dcd044d5c8' 
  AND token = 'es6fpyfLIhuux3Gv1rSaPp1tf7cQzufaEkjkvOvZQkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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