Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28f3a69f6d5e2215214af2b1cc4883f92d15ad72d26b4807b78f39e0d56283dd' 
  AND token = 'ZkPXc9C5HlXnHqVJsGbKYRoAm0/sffYMSPddH1KC5oE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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