Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f16b8dc9b77bf36b8d2883c2fda89b28fc607e00ec68b0e7ee9fd36e42e1be3' 
  AND token = 'ogSqZE55c6ru/pK76kw1xtYVvvFB0bEJu5iOUDqb/i8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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