Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea65d157569b6ee3ae4cb35fa9a23f09cf5ece3830dcb7447028ecc84dd2a2ea' 
  AND token = 'mUdXp6ghDR6+kEBpnn3y1EaWTdoQevlIrR8B9xChd0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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