Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93c77ea7269e7f854657d57470a6f6d6cb4d6afb6b5f5bec797d8af7999e0425' 
  AND token = 'lPQgvkN684Dv0kTny9D3R3xp2tMZ4yDux0eoCUtutwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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