Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36aca149a9b95e4f461019c4c98da41325f004b154805619fd6220a45f39106c' 
  AND token = '3KIp+InrC/KKfikY1ucK+gNEL+7tETxNg0SvlBZji60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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