Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '879af260d5d3d07e783772d9dc072497db5ca107dcdad7afb9ec13445bca7a4c' 
  AND token = 'momDoroAvd1DJxy5FhoZkFb2tFAe2O8BX3NsGCjMVWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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