Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40cf3562e009896e9485681c72b1b8db2c8ace8b89153caa0493857d87be384e' 
  AND token = 'LPkAV/1y72rW1czh8E4Je0skqAaIi2XsEidYYsjjb68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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