Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a08c325db9b8ce7c8b033aa4620535a7d206f19e97a5d9af9976bf631560b7ff' 
  AND token = 'R1k5Xo+Lnp1IUedpouYrON8R4pjoH+EBx/fsg+GQ0DU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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