Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '379174129caaf2d930c42b758c46a23638c8dd64e72b674ccb6e54b3b736d294' 
  AND token = 'hacEKnamjW4MXCapAOu0g7oYgWfFAvvgNRdKjcO73Yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00076

JSON explain

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