Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '049ece7402ed4513fc639ca3a2ad9aef4792d4df3524300fe98da3653092c7e2' 
  AND token = 'WpqeyLlFfDZpPFOeDpRNcgZAcexgCkLQwuKJHViGmjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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