Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b99980465acf16bdc3e836f82288f95159f01ec6597bc51048bd516707e63299' 
  AND token = 'ggy3qvIOMSsn6bm0Iw5G6R3mkptja5/20wuDf2G04v8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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