Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a1b2b1c86c2b88e8a0f78c3357306cea71a011a946b4adce4570aa8ecd21f89' 
  AND token = 'ByZrpQSWyA5B8mF7SjZJSfGd0EWURAxOertvhfafCE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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