Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c628c2e9f025b31f660edd0facfd87845264941a7366b5c3b9eab65baf275582' 
  AND token = 'BJaV5XrKHL0hC0hvoLfZZJsxIH5uCA/4Lfe8Tii3ip0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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