Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffc8674de268f152bb64c96825cf56d582702d658694705b5cd5508a0a14b83e' 
  AND token = 'RDt4u8XAQdski7aegwZlF/LTGrXnqUJxS0fbMRW/BCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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