Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a90920a46e1e52a4c9a40d0dd2937dd3d074bcc352d4b775c09fecc942527168' 
  AND token = 'RbQZcPWnQAPpSYQIJoRLaKOP7b+Yduq/T8PtHfUSJKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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