Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79048fda6f0f72f4441d560fcf2b1779b33f8a8cc243185161eda7f1f201942b' 
  AND token = 'x9Rk9FYi3cB7df/9yGbT5/P5HvipE+SOvo6hPb77Wvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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