Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a01a9097633deaaae251efaef5ae73370978ba892f5600fa0fac114c900c9b97' 
  AND token = 'xMgtF7tcHAL748riaOE3tUHTQ3OoEkIwadlC/+Zrw2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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