Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3d540b591c874fecff738688aabcf90ae747784e1b084c2e6cdc74e7c45b934' 
  AND token = 'ewjUEGpoiQMynep23LsrF8Iv7MdNGvaWgwDJG/2kmA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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