SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '41d2413736c1e16830b050ad01f19fd5ee6bf4e9dc789dd922ce564c6af7766f' 
  AND token = 'Vj+aUA+s1Rk9LwDDLUHNPuRxKRClD2+nZDpoG8Hq2s0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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