Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a52216ac128f9fa7c4278a3780bd28c3e6d34a0c5affc86d50c774cdb9853115' 
  AND token = 'qzNE0Fh98w1R/1zMHfFXoIUuk3lU2sWXGqIA7txIYcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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