Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdce7f38f8be1b1306a21ed26b9005bc4ceb172085021cff8d44562f154a7e47' 
  AND token = 'eTRb/lPLW3XveKFEob+MXmvnFmw+0Y4eTeHSnuYzKoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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