Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83c92e00c5ab3a67e514460d44d8bdd87aae81237d96eb766d60071c9bfd5e33' 
  AND token = 'y6H9FRs0HnIjkwiEq5YVH69FO53kl1WhIsTNRPqlNJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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