Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c966b81deab4bc278f5c6903560f01029dbe63b92b5487f837b5cb4e5efce03' 
  AND token = 'txrKsPP+wg3A5YqRh7ukkAEjWhBI0vc4/VxL7AS95ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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