Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eea8f4da4fb97d41124763101db18bc189553efc29304c225c48040f3721b16' 
  AND token = 'VwnwzTbX+2CWU4q6HEikCMy8XZzB8fWPVl34Q1kTw4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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