Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '541bbbec68ed7a6b8c981a60b98d11c6a3b779670a54ce82c495f835ac3a7867' 
  AND token = 'ggTmM1NPEs/xjOtWmYmiEpqNl3gun/rQgp35PFkyVBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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