Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c800504c08f06da6aca37ef38c6769feb123f0066cc19a950d459d2fa7efa09f' 
  AND token = 'eqecD8umOAi5rLATSsQ5ykMzJFQfQfvFGh8uBZpTjYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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