Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f0a63e13a88bbcc108bcd105a881f69a40d0ff3ea580799813bcd1620295120' 
  AND token = 'mTD85J7QXYHZ0MqW2cfQBXRLpyYM0O6e25BxuL+0qSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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