Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4450f8e2b1583b4a0e3624e60fed738fdba8f3d369af32d03f9033d0db2a275b' 
  AND token = 'D7PXRSzu8CyajflzTPovofLl3m3pod3YqXB8ytSdWnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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