Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1a10ad4d51a7d9c34c7799749b5b88cd7d4ea2fb8ba1a2e2cb69bc6a9b80330' 
  AND token = '6rqIYFql20Gv67JHZRw1IEn6HGD5vdtP5N8RX+RX37w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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