Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef0db72a99ca760d1855500a03d8bfdc1218071b8e45a7720b8eb6f3dbef9260' 
  AND token = 'dul5n20aHC8LcJxw5Or9BiP1tuGPxXrSo6JnZHYyAx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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