Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6a8ef7ab319237acb8c61b6fc412c792c7254a4e772f7889c7752af25569922' 
  AND token = 'pj5Srg6ZVgTIWhxTPYI1+bGLkD4+63AQEh9X4POXfdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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