Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6150802f1fa6fd9df84f3d7cf60ce1155ba670b5a6a7823fde57bda507014cc0' 
  AND token = 'dTK84EIW9ik0mszkoO0Xkz3zv55WOvZ2oOGWbFNgjeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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