Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd88a2e348be75400c86f831773483c04acd0e9a054dfb9c5981a20a08ae25713' 
  AND token = 'UFBeQRrM5Gt35ePC0feaIvBzqiaWo6W1pH+HqsmC4+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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