Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d68f0461a640885a31c661088068094828b89907e30b6679427cc88a8b64b40' 
  AND token = 'VcSkbQqHoNBNDVq7bXNcemPvh1YDLW61yusNObHBPqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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