Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4897f573ad03b92664a2983d758b50e6cf631eadbe8e6dbdeb460e410626adea' 
  AND token = 'uw8cVLoI0k0lIo+BGRRF6rcMWj3vYKQpKUi5KHz0bVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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