Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db1e7d67360d249184f3db3dd2ed792f1e7f68b156612c62262dd80522de9b34' 
  AND token = 'qs6CXWP6NVBYb4635Z1lMOd0Cjqh4CyGYGaXfLsvMds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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