Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99ad45d2d6869a2619cb234aa928964f0bc125e215abdfbba96e258aed942e2d' 
  AND token = 'hOInVXKW8theuJ8XzW+t0m4OLJrl8jB76aU0W9BISBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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