Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7ad52a3c6be3758a9ff63b092494d09f4b41932b8d0114443b760c29b2923d6' 
  AND token = 'Dj7XgQ9XcfBzl9OCFKml4I3PqeAsK25dHoNxK+Bgg8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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