Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42463db5df63013cc7d2ae21d728ba6e5b91c0cd439c871d4b1aa5cc82ace992' 
  AND token = 'Z5D0xlx9nGdGZxaj317zyR5F7bQELeDdNKqvwXzggQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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