Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d7af83ee94fcf4dace9272770cd2875e0858d18021ff2f3f070456911a0d861' 
  AND token = 'Oeluht8zQ5AUrvF7mFkiYBkKYz6K2Mqj2vOKPYhh1y0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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