Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f905e0eba870ddb274e15924af0b74802e9064e9e8560037f2be996195d441c' 
  AND token = 'oHa81CIVW2FsJ0AEQZ5aKvXDvd8a7kMrBZ19WXrHg4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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