Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '439e4635684b810d138c42628dedce95047762263e0ba3bef4ef72964db4f863' 
  AND token = 'SLS+O9GveILb/1jLRd/+SCi6Bu0zS85IAH6gvVljxc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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