Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df0cddb80adc65e4c2089e8161dc90bc181f9c55ffc1e3449f58df6078ec98df' 
  AND token = 'vAN5LCi4asYmayK9w0sBwWW4LVrKXD3kqH9tZ5/lSoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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