SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc1f5965d77f37021a57ccb0d6843eed2b233a497fcf44c939a31bd64114b5dd' 
  AND token = 'OW4KffNWsLoRbzoGOrSO8EiV3hXUeL5Bqd+k2BFDJsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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