Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27e6bb953715de94a01457d8a561c3397ad52f2bb734e19557a04041ace4f83f' 
  AND token = '53shR6tY07KuxUlsl2lE/99Rcx0BKAweCic732PgIRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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