Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a70cbaaa5f45d77d5a9e4b8a014a08fe27206aa96c78428c69bce90db294685' 
  AND token = 'yR53REn6xxLGnaYEMhBsT39+Jf3BFxj9m68+ynTO4cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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