Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef4824d63a97bd142a21d9750b14dc4e2b054f7a4c12002910c64555641f6b5f' 
  AND token = '8OiOhIno/CgNDuu89+ALCKOK6MS/to1sP0xh4DRTKbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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