Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42e3f335723e9322864763b5d388c9d27f69fb0b893eb7e35267164f82c2043b' 
  AND token = 'w58ZrvhiZugRpkWdHihVV8OnxzqrUzW3DVRF9bxOHn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}