Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb087330e4a5b5ad083187d708fa45640c74d8a2ab2da4ac09d14143bedb27e7' 
  AND token = 'G8p5mVa5oe/Y/5DxPmmtmqSmzuJ5+m34PVlQYICUSQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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