Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fba7860f64faf271e24533525197ae8e01a0e8a38590a19287ad10b541651a8' 
  AND token = 'kMgxJxCJ0stZ5I8eWi55/Bk1OEygS79DHpVuDwxlkSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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