Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6047658d4c7477eb80f02604a0539ade3050f0d37f73d492b42b2f6674a90c53' 
  AND token = '/P+JBfoaoCNhf4wDVYY6RccCs5V9yqbM/+7wmDpbUVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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