SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '384508ca692e3585e51ca6c8b1a4f59f3f328434d3f91845b50432681757ec24' 
  AND token = '7Sd6YDlgGwsvzrNbvGW/3tq16qp+NTuT+BucS3nnhyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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