Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9165a6b14be9ab8c6dc1b15824654a5e6c97d0be685fe888d9782594801543e3' 
  AND token = 'ZCBZPg4/GSTfybPsfr/nlCwTi1Yi1AhLLpM6vZT5ymU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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