Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '193c1e7b1f5392fe8eac06d426e3d0dac20580200fe45aef0c5fc7f8f2f17b56' 
  AND token = 'NRyIADssWaoRYn4pU/LE/XY5K5PXbTwDGIi+VvEZJWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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