Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7258d60d6a38f4bd53adfe4e05c1bce41c41fd13850c2b32f1bf661d5783604b' 
  AND token = '7PwUkHMTRWH0ASudRl5biI4AKqY/c33rr7hl96M0Og0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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