Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b524dfde734e769260c245db2308cbbced141110aa7ba9aac8bb78db55938f0f' 
  AND token = 'pmgfCbHzA7hlg1QQznt/n5cBXTI93Uox6itzRJJ62YA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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