Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2ead362978dc398e33bbc74ed5f97c7c349f8c558ec5bf6eb5c19234b8608cf' 
  AND token = 'aD+1dLYcdXIjtAe2K2fOwTxhsqVOkqu2Z8DRz4C2QNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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