Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e43f9628f020c2da060c9cb0aaede4bb2cd69354b5cf2e2ca80575089110d29d' 
  AND token = 'RpChhR/FwAyK111bgS8h9jXl9XCB9qcJzWzR9bRt3FI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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