Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5b8e9740e9e61339f5246878641018079f5e64b608b3fb7193555d663166320' 
  AND token = 'bzYFR0WXV6RWdaDejF5wvkPFeontuJNOduC+feBi674=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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