Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '401adffcb2797f90d92093387fe64bd32b62101a2356a86049425efbd9dafc55' 
  AND token = 'BqDWbtEkf0dNcRmJTYn6bwfnldebQI1JXxGRjn4eU6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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