SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b01d492ff807b20606c5c78a90d6fc656923133e9e580380c4f7be39c6a44862' 
  AND token = 'gbR34Tc2O/NZIZYhhJzyk4ok4kRJFrBYMuF3X59Vjrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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