Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6030db10c56b1d8793afaeabba785f1274f2399817b50008b69a9a138fef5182' 
  AND token = '74D2Jod2tzgAPsO4JEvQs2wKbSuiOrI5KHndk/EnkRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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