Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f02ccc8998c4dcbfe13227edb676db8e63357b0da25833cde2a10e9203a34dd' 
  AND token = 'ChLm1CUR3XOSQ0T7gjOCMS9S/QSRqTSKGfzyfyfDvps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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