Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a6580b23e4e9d15f08faa37ab24e09372a765f402e39297641b239c9e77baf6' 
  AND token = 'Exxkt6EmAl4HKkSClUN4WhAHvWFro1HTzs4LNNV/sfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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