Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62ff194f55054c408224568601e6e65bbd7ba22457e2e75bdcd559279b2dac61' 
  AND token = 'T7pjM3wlOnaF4TDAvxINGCaXKkPoHHRkwCMaTsScNks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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