Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a44892d3397c5120c14ed6cbc5d671e6bd75ddd11164d1d8ad40abcd013d43d9' 
  AND token = 'NU0zFlCcJcLL4li0f+xepsVo5dtpE+lupcBKBLRjyCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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