Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84630b0b8fc6fc55940c4aa24c3a74b2293947549b4d08f0670597061622f21f' 
  AND token = '34K51z6UjLlW9EndDeYIvIkIEgVej3aBpCeToqo/bpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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