SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d0071d3dbeea53bf62591f63df75b725bdbc82789981e45083eacf607688b0c' 
  AND token = 'QJ7mSAV0eXyGX458ypVGoz6xGyFZqOv1cu3uF5Qrgow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00122

JSON explain

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