Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '822f73e5141369a99319ab8a3142cdb80937eb94093be62349953ccce11c935f' 
  AND token = 'bvp0jGb5B7xwe+Fc/mkqpoc2HgnTjZJVjwjxMEJAL9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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