Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e946e2fc8c1f14aea568ec828c0f44360a3756579cc949fc7bed308c996d649f' 
  AND token = 'Shzh3/NkAPb23pY0j8g2uqmnSjdvnF9alD0ALsQH4E8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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