Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ad0216a4c6d92303d575c64cda9e6f973551cc28d67d53c792543cf7c8e0812' 
  AND token = 'n93w+KQmKHaJHiZF7iw0933w/sZjU8nI5Fk9VvUk/so=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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