Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2188983aae350e710e2484e588e0d9d6ff36c5ba877f6193dfbfab9b8c6cca6b' 
  AND token = 'ATUsk4nHXQlAEiLM1R7dyQtVogCda+rXgz5b16yCiPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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