Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd462d033813f9cf3b56c3b760cbb3d1e94c7db7fbafe734a459acc9a3fb53f39' 
  AND token = 'B7Mw5+eqDw1ccjBqRXaubhePNalI9x6aLcoJbfCeyBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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