Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57a431e1ff0500c7cc457f6b80bef6d46c447e3a648e3b42de5593941500c86e' 
  AND token = 'nvByzZvESfJiSEn1VQunHeJp09Pi6v53tWHsHkNBtIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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