Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd37b923b7f580b646a837d9270996f8622b7541994c2805277b9537c13249430' 
  AND token = 'YyFkYL7xb7oOaLlTAFMrPWS+w7zdblEzWeC6hHmT0qo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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