Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82a7141e618479552a0fcaa7b4fbf670599577a5f16c0c60ff4b86a33927a3d4' 
  AND token = 'aLWISGOC5gjOyOgdsoF+hy2aSfiVvITAMWnWY+2g7lo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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