Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7fa902ea6f76574d690d8da965691759879cffa0b6df46f033e1255ca745b70' 
  AND token = 'qOq5chGkn08cA7+8bcoMZFJPaMxpmT6WO9GSFE4KdEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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