Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7363171e135c0c1a599e6beeba368dcf8b8277e63ddbfb532ca4f398691772cf' 
  AND token = 'U3dZ9Qd6+knc8mIUqw6ZtlrRBPc3JEERCBK/kWO1hwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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