Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '789e6789e5e2c2d5c3df7b1a9b679923cd44bfefcf6a955b74af7db82fc96d3b' 
  AND token = 'ObduAR0De4IWIppZ/YF4k5b0XKH+4QMKQeVvJbJAKJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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