Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b4a9504fd9682d1f59aae23a6f16fdc4e8c6bdb3d3e87cb8170e0da742ddb1a' 
  AND token = 'FtvLGFzMSiGktKQz9plKjFF571ItWX2hbLxKg6275pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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