Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb47f35882484c1fc9084c4b0a63903a09440704d3eb20496f7d2f59df5069b3' 
  AND token = 'tlgGR3cl8o6CgclY/xBtHa4Nl2vD9QpGeEDqd2zIK2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}