Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a9b1e76d1bfd07a601a408f43f6d3a3cc1f00f47a67a4f4952bc541fe518065' 
  AND token = 'niJF3QP2nBLcwbWeYnv5Oe/AiE7fY+9/3rHOL0Adri0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}