Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '515da2fe22fc0f07b5e4ab577c466bc79918f59d46ad5128476c77ccc3db818b' 
  AND token = 'MHGFefu4oeF5IognZfrpUDi1lO0iFx0PkrN0Hzq/uB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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